Features:

1. Innovation design.

2. The volume is small.

3. Metal spoon chain puller bolt.

4. When darkness may make the illumination use.

5. In constructs 120db the warning output.

6. Person's ideal security guard who for the jogger, the senior citizen, the disabled person, the going out picnic's person, needs to protect.

7. When yu meet needs to help, draws out the metal the spoon chain puller bolt, it can exude the warning sound immediately, brings to passer-by's attention to render the assistance.

8. Use 4×1.5v lr44 button battery (sixth branch including in within t

9. Size: 69×42×23 (mm)